HIV. Hiv serology (antibody test) is highly sensitive/specific repeated eia test (serology) of initially reactive specimen is a common practice and is followed by westeren blot analysis to confirm the antibodies. In infants upto 18 months maternal antibodies transfer through placenta may not represent true infection in an infant. Hiv PCR test has high sensitivity and sensitivity.
The tests for HIV/AIDS include: HIV antibody 1 and 2, HIV test, CD4, HIV 1, HIV 1 and 2 Western blot, HIV 1 coreceptor tropism, HIV 1 DNA, HIV 1 genotype, HIV 1 RNA, HIV 1 virtual phenotype, HIV 2, HIV 2 antibody immunoblot, HIV 2 proviral DNA, VDRL, RPR, Comprehensive metabolic panel, Complete blood count.
Indeterminate? In HIV testing, the words that are most commonly used are "negative, positive and indeterminate". The word invalid may refer to a problem in the testing in which some or all results were considered invalid. If that is the case, you will need to have the test (s) repeated.
Any time. Centers for disease control recommends testing all adults for hiv.
You are HIV negative. If your HIV tests are repeatedly negative, then you are negative. I'm not sure what you mean by symptoms of HIV - probably need to be more specific, but the symptoms (such as fever, sweats, weight loss) of HIV are very nonspecific. This means that fever, sweats and weight loss can be caused by other infections (like the flu, common cold, tuberculosis, or fungal infections) or cancer, not only hiv.
Missing info. When was the sexual contact?
High. Since the test is looking for the virus itself it is very specific. There should be no false positives of titers that are significantly above the minimum of detection (of course some human error is always possible). Similarly, since it amplifies any detected viral RNA a million-fold, it is also very sensitive.
No. Tb can occur with HIV but does not cause the test to be positive on its own.
You can ask. For an HIV screen or go to a public health clinic if you want annonymity, but your doctors cannot order an HIV test without getting your permission and informing you why. It is not a routine screen done at the gyn visit.